Here is an ambient campaign for Kvallspressen Impact in Sweden:
This bike seat reads: "Advertising here is peachy if you want to reach people who like to stare at bike seats."
This stairwell reads: "Advertising here is really clever if your target group consists solely the people that use this particular staircase."
This t-shirt reads: "Bonjour! Advertising here is great if you want to reach some ad people "working" in Cannes."